baber/WOPTO huggingface dataset:
Patent GB-797306-A (GB)
Title: Improvements in or relating to electric amplifier arrangements
Inventor: COWCHER EDWARD
IPC: H03H7/48
Filed: 1955-12-23
Abstract: 797,306. R.F. couplings. GENERAL ELECTRIC CO., Ltd. Dec. 18, 1956 [Dec. 23, 1955], No. 36973/55. Class 40 (7). An amplifier arrangement is constructed so that if part of its output is reflected back due to mis-match, as, for example, from an aerial, the returned signal is not again fed to the output in the form of a delayed echo. In one embodiment the arrangement comprises a first hybrid device 3 fed with incoming energy at 9 and providing equiphase outputs at 7 and 10 fed to amplifiers 1 and 2 over lines 15 and 17 differing in length by a quarter of the operating wavelength. The two amplifiers are thus fed in quadrature. The amplifier outputs are connected over lines 16 and 18 of equal length to points 12 and 13 on a second hybrid device 4 and the coupling between the amplifier and the line is made capacitative in one case and inductive in the other so that the signals received at the second hybrid device 4 are in phase and combine at the output point 14 coupled to the aerial 22 over feeder 21. The lines 16 and 18 may also differ in length by half a wavelength or any integral multiple thereof provided that the signals fed to the second hybrid are in phase. If, due to mismatch, energy is returned from the aerial to the hybrid 4 this is divided equally between lines 16 and 18. Owing to the fact that one of these lines has a capacitative termination and the other an inductive termination the parts of the energy reflected back to the hybrid will be in antiphase and will be dissipated in resistance 24 and have no effect at output terminal 14. The hybrid devices may be rings of waveguide or coaxial transmission line or they may be hybrid T junctions. Specification 735,927 is referred to.
Patent GB-821309-A (GB)
Title: Preparation of a tetracycline-urea compound
Filed: 1956-12-04
Abstract: A compound of tetracycline and urea is produced by reacting urea with tetracycline or a salt thereof with an acid or a base. Specified salts are the mineral acid salts, the alkali metal salts, the alkaline earth metal salts, the ammonium and the amine salts of tetracycline.  Tetracycline-urea has a molar ratio of tetracycline to urea of one to one.  It occurs in various hydrated forms, e.g. the mono- and trihydrate. <FORM:0821309/IV (a)/1> = - 220 (in methanol). The compound is used in the recovery of tetracycline from solution including fermentation broths.  In the case of organic solutions such as are obtained by the process of copending Specification 821,310, an aqueous solution of urea is added to the solvent solution and the pH adjusted to 2.5 to 6.0 and preferably 3 to 4 by the addition of a mineral acid such as hydrochloric acid and the tetracycline urea precipitates.  It is preferred to use 3 to 20 equivalents of aqueous urea per equivalent of crude tetracycline.  The solvent solution may also be the solution resulting from the reductive dechlorination of chlortetracycline.  In the case of aqueous solutions or extracts of tetracycline, solid urea preferably in proportions of 6 to 30 equivalents of urea per equivalent of tetracycline, is added to the aqueous liquid and the pH adjusted to 3 to 5 in order to precipitate the tetracycline urea compound.  Tetracycline is recovered from the tetracycline-urea compound by (a) slurrying with an hydroxylated organic solvent such as butanol or 2-ethoxyethanol and treating with an acid to precipitate the acid salt; (b) dissolving in butanol and 2-ethoxyethanol by adding an organic base such as triethylamine, followed by acidification; (c) adding water to an organic solvent solution and adjusting to pH 7.0; and (d) dissolving in acidified water and neutralizing with alkali to produce neutral tetracycline.
Patent GB-1442460-A (GB)
Title: Current limiting variable resistance device
IPC: H02H9/02
Filed: 1973-08-06
Abstract: 1442460 Electromagnetic switches WESTINGHOUSE ELECTRIC CORP 6 Aug 1973 [18 Aug 1972] 37168/73 Heading HIN A current limiting device for a circuit breaker (Fig. 4, not shown) comprises a pile of discs 12 which, under normal current conditions, are compressed between copper plates 16, 24 by a spring 28 acting on the shaft of a plunger 34 of a solenoid 38 in series with the discs. Upon excess current flowing through the discs 12 and coil 44 of the solenoid 38, plunger 34 is pulled into contact with member 40 thus removing the compression force of the spring from the discs which then separate from each other so that arcing occurs and the resistance of the device abruptly increases. The discs may comprise silver and graphite, copper and graphite, or graphite electrodes in an oil or water bath.
Patent GB-1189924-A (GB)
Title: Tentering Clip
IPC: D06C3/04
Filed: 1968-08-05
Abstract: 1,189,924. Tentering apparatus. BEVIS INDUSTRIES Inc. 5 Aug., 1968 [14 May, 1968], No. 37316/68. Heading B5B. [Also in Division D1] A tentering clip for gripping plastic material of different thicknesses comprises a body having a horizontally disposed base 11 and a clamping surface 27 provided with a slot 28. Two spacedapart arms 20, 21 project upwardly from base 11 and overlie 27. A pintel 23 is mounted in the arms 20, 21 and a jaw 24 having a projection 25 and clamping edge 26 is loosely hinged to 23 to be normally free to move automatically into clamping engagement with surface 27. A bracket 30 having two spaced-apart fingers 31, 32 is fastened to the body and arms 20, 21. Two spaced-apart legs 34, 35 extend from jaw 24 toward bracket 30 and support a shaft 36. A pin 33 is supported in the fingers 31, 32. A controller 38 has a body member 42 with a forked extension 47, 48. The material engaging face has a micro-inch plastics material engaging area 43 and a thick material engaging area 44. The bearing 41 is mounted upon shaft 36 to hinge 38 to jaw 24. The forked extension 47, 48 slidingly engages pin 33 to slidably suspend 38 to the body. Movement of jaw 24 from open to closed position pivots body member 42 around shaft 36 and pulls face 39 into the material engaging position.
Patent GB-1081517-A (GB)
Title: Cathode ray tube display apparatus
IPC: G09G1/10
Filed: 1965-09-01
Abstract: 1,081,517. Cathode-ray tube circuits; transistor circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 1, 1965 [Sept. 17, 1964; Oct. 2, 1964; Jan. 15, 1965], No. 37319/65. Headings H3T and H4T. In an arrangement for deflecting the beam of a cathode-ray tube to trace Alpha-Numeric characters, vectors, &c., the deflection waveform comprises the ramp signal output of an integrator to which is supplied a first steady state signal, termed an overdrive signal, having an amplitude equal to a multiple of the deflection amplitude required, the integrator characteristic being such that, after a predetermined time interval, the amplitude of the ramp signal is equal to the required amplitude, a second steady state signal having the' latter amplitude being then supplied to the integrator. This arrangement results in an improvement in the linearity of the deflection over that which would result from charging the integrator only to the required amplitude. In one embodiment (Fig. 1) which is concerned with the X- deflection (a similar arrangement being employed for the Y-deflection) digital data representative of the absolute endpoint address of a vector is derived from a data processing unit (DPU) 21 and combined in adder 33 with digital signals from register 40 via gate 39 representative of the previous endpoint address X to derive the actual deflection required i.e. #X. The X and #X signals are then manipulated to produce the quantity X + 3#X (the overdrive signal) which is fed via register 40 to a digital-to-analogue decoder 65 producing a steady state signal as input to the integrator 67. At this instant the vector timer 75 unblanks the beam of the tube via control 77 for an interval T (all vectors, irrespective of length, are drawn in time T) during which the beam is deflected in accordance with the ramp signal generated by the integrator. In the interval T the circuitry generates the real endpoint address i.e. X + #X and at the end of the interval as determined by timer 75 supplies this signal to the integrator, the RC time constant of the latter being designed such that in time T the ramp signal will always travel onethird of the distance required to reach the X + 3#X level. The endpoint of the vectors so drawn X + #X now remains in the register as the initial point of the next vector. In a second embodiment (Fig. 2, not shown) the data-processing unit 21 supplies both the #X and the #X + X information thus allowing a simplification of the circuitry of Fig. 1 to be realized and in a further embodiment (Figs. 4 and 5, not shown) the digital-to-analogue comprises a plurality of resistors selectively swtiched into circuit.
Patent GB-1497251-A (GB)
Title: Toy aircraft action skill game
IPC: A63F9/02
Filed: 1976-09-09
Abstract: 1497251 Shooting game A E GOLDFARB and E BENKOE 9 Sept 1976 [15 Sept 1975] 37404/76 Heading A6H  A game comprises, two aircraft models 58 mounted at the ends of a board for manuallycontrolled transverse and pivotal movement and associated with projectile firing means 52, and a target 98 on each aircraft reacting to a projectile fired from the opposite aircraft. The board surface 10 slopes down towards each end from a centre line 18 so that fired projectiles (steel balls) collect in trays 28. Each aircraft mounting 32 is guided for lateral movement by a bar 36 moving in a groove 22. It is moved by a hand-grip 48 containing a gun-button 52. The aircraft is supported on its mounting by pivoted plates 96, one under each wing. When a target 98 or a plate 96 is struck by a projectile it moves back assisted by a rubber band 103. When both projections 98 have been struck, the aircraft, being no longer supported by the plates 96 tilts forwardly about pivots 90. Its undercarriage, being pivotally mounted, simulates collapse when it strikes the board. The hand-grip 48 can be rotated to swing the aircraft about a pivot 83 through a connecting rod 76. Deflector plates 112 swing with the aircraft so that, when the firing- button is pressed downwardly, a pivoted member 104 projects the ball along a channel 56 to hit the plates 112 and thus be directed towards the opposite aircraft.
Patent GB-1083359-A (GB)
Title: Improved magnetic head assembly and method for manufacturing such an assembly
IPC: G11B5/29
Filed: 1964-09-15
Abstract: 1,083,359. Making magnetic heads. AMPEX CORPORATION. Sept. 15. 1964 [Dec. 2, 1963], No. 37630/64. Heading B3A. [Also in Division G5] A magnetic transducer head is formed in two halves each comprising a generally U-shaped body 10 in the limbs of which are formed circular grooves 24 having parallel sides. A plurality of laminated or ferrite core halves 40, 42 of complementary shape are inserted into the grooves and secured by an adhesive, the surface 60 is finished, and a non-magnetic spacer 61 is deposited on one of the cores. Two bodies 10 are then clamped together and shields 47 are inserted in slots provided between adjacent cores and positioned by means of a stop member 43 inserted in a recess 41. An end member is secured to one end of the assembly which is filled with a potting compound and closed by a second end member, and the assembly is finished by cutting along line 70 and polishing. The body 10 may be of metal, such as aluminium, or of ceramic material.
Patent GB-1455630-A (GB)
Title: Tobacco compositions comprising monoesters of mono- and di- alkylmalonates
IPC: A24B15/32
Filed: 1974-08-29
Abstract: 1455630 Flavouring tobaccos LIGGETT & MYERS Inc 29 Aug 1974 [24 Sept 1973] 37822/74 Heading A2C [Also in Division C2] Tobacco smoking compositions comprise as flavourants at least one monoester of mono- and di-alkylmalonates of formula  in which R, R' are independently selected from the group consisting of straight or branchedchain alkyl and aralkyl radicals of C 1-8  R" is either H or lower alkyl of C 1-6  and R"' is H or an alkali or alkaline earth metal. During smoking the malonate decomposes to yield a low molecular weight alkanoate ester of formula  e.g. monoethyl sec butylmalonate decomposes releases ethyl # methylvalenate. Examples VIII and IX describe the inclusion of a variety of esters in varying quantities in commercial blends of tobacco and evaluates the results.
Patent GB-1370968-A (GB)
Title: Flexible bags
IPC: B65D75/12
Filed: 1972-08-14
Abstract: 1370968 Plastics bags PROCTER & GAMBLE CO 14 Aug 1972 [13 Aug 1971] 37881/72 Heading B8K To increase the base area of a bag and thereby facilitate standing the bag upright on one end the opposite edges of a fin seam 19a are tied together. The seam may have lines of weakness 16a defining tie members 18a, 18b that are separated from the bag by tearing along the perforations and are then drawn towards one another and tied to form the larger base area shown in Fig. 4. In another form, a single tie (18c, Fig. 2) is passed through a hole at one edge of the fin to draw the edges of the bag towards each other. A separate piece not integral with the bag could be used as a tie or a strip of adhesive tape, a cord, string or wire or a paper clip could hold the opposite edges together. The bag may be made from seamless tubing of low density polyethylene having a thickness between “ and 10 mils. for single walled bags. Multiwalled bags may be used.
Patent GB-1182038-A (GB)
Title: Device for preventing the overturning of appliances such as jib cranes and excavators
Inventor: BIRNKAMMERER FRIEDHOLD
IPC: F16P7/00
Filed: 1968-08-08
Abstract: 1,182,038. Monitoring crane stability electrically. SCHWERMASCHINENBAU S.M. KIROW VEB. Aug.8, 1968, No.37937/68. Heading G1N. A device to prevent the overturning of, for example, a jib crane or excavator, comprises a mechanical oscillation generator which may be a vertically or horizontally oscillating load, means to measure some parameter of the vibrations impressed thereby on the appliance and means, responsive to the vibrations, to switch off the prime mover at a certain value of applied moment. The parameter (e.g. frequency amplitude or some derivative or integral thereof) is measured and transmitted to a calculator through an amplifier and a suitable transducer. Further measuring devices and transmitters may be included so that the calculator may take into account other variables affecting stability. The calculator initiates a programme to switch off the prime movers, tending to increase the applied moment, in a predetermined sequence or after a certain time interval. An additional device may signal the occurrence of an overload. A delay element may be introduced to prevent premature actuation of the switching programme by a transient overloading condition (e.g. wind).
Patent GB-1020276-A (GB)
Title: Improvements in machines for sealing packages
IPC: B65B51/10
Filed: 1964-09-17
Abstract: 1,020,276. Heat sealing packages. FR. HESSER MASCRINENFABRIK A.G. Sept. 17, 1964 [Sept. 18, 1963], No. 37959/64. Heading B8C. [Also in Division B5] Packages P (Fig. 1) are fed into revolving hermetically sealed chambers 3 where they are evacuated via pipes 2 and sealed by electrically heated jaws, which are initially heated by passing a high current through the elements and maintained at this temperature by a lower current (see Division B5). In the form shown, packages are ejected from a conveyer 1 on to a conveyer belt 5 and via a push member 8 and pivot arm 9 on to a stirrup 16 (Fig. 2, not shown) in the chamber 3. After evacuating the package, it may be filled with protective gases through pipe lines 22. The sealing jaws 15 (Fig. 4, not shown) which comprise profile members 28 coated with insulating material 29 and heating elements 30 covered with glass fabric or polytetrafluorethylene, are then actuated by pneumatically or hydraulically operated cylinders 23. The packages are then returned by means of a rotating plate 12 to the conveyer 1. As each filled package is transferred to the evacuating apparatus 2, it passes a scanner which automatically connects the heating elements 30 (Fig. 7, not shown) via transformers 58, 59 and contacts r50, r51 to the mains. After a predetermined time the contacts r50, r51 are opened and the transformers 58, 59 are connected to the mains via contacts r60, r61 and a regulating transformer 60. If a heating strip 30 burns out, a lamp L1 is lit up before the packaging machine is automatically stopped. Alternatively the heating current transformers 58, 59 or the heating strips 30 may be connected in parallel during , the preheating and afterwards connected in series for continuous heating. Thermostats may be mounted on the sealing jaws.
Patent GB-880426-A (GB)
Title: New acylated ª-ú¦ª--dioxy-diamino-anthraquinones, and their manufacture and use
IPC: D06P1/20
Filed: 1958-11-25
Abstract: The invention comprises acylateda  : a -dioxy-diamino-anthraquinones which consist of a single anthraquinone nucleus in which each of the outer six-membered rings contains one of the amino groups in ortho- or para-position to one of the hydroxyl groups, and in which one of the amino groups is acylated by the formyl group or the carbomethoxy group, and the other amino group is acylated by an acetyl, chlorocetyl or carbomethoxy group.  The dyestuffs are made by acylating the appropriate a  : a -dioxy-diamino-anthraquinones using acetic or chloracetic chlorides or anhydrides, formic acid or chlorocarbonic acid methyl ester.  The dyestuffs dye or print polyester fibres red to blue shades.
Patent GB-1084615-A (GB)
Title: An abrading machine
Inventor: TURNER ARTHUR THOMAS
IPC: B24B21/18
Filed: 1965-09-07
Abstract: 1,084,615. Abrading. KINGS HEATH ENGINEERING CO. Ltd. Aug. 25, 1966 [Sept. 7, 1965], No. 38096/65. Heading B3D. An abrading machine comprises an endless flexible belt 28 having a pair of runs extending between a pulley driven by an electric motor or like prime mover and a bearing 24 the distance of which from the axis of rotation of the pulley can be varied for adjusting the tension of the belt, the bearing including means for floatingly supporting the belt on a cushion of air. The bearing 24 has a lower flat surface for location in a head 10 carried at the upper end of a tube 12 which telescopically fits into an outer tube 14 and is urged outwardly by a compressed air piston- and-cylinder, spring or lever system to tension the belt. An air inlet 16 communicates with the inner tube which is closed at its lower end and is connected at its upper end through a pipe 20 to a passage 22 in the bearing, the passage 22 being connected through a bore 30 with the space between the belt 28 and bearing 22 to floatingly support the belt which is prevented from moving axially by spaced guides 26. The outer tube 14 is secured to a guide plate located relative to the driving pulley.
Patent GB-363826-A (GB)
Title: Improvements in and relating to electric protective devices
IPC: H01H85/42
Filed: 1930-12-18
Abstract: 363,826. Fusible cut-outs. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Hinds, H. P. ; 90, Livingstone Avenue, Fittsneld, Massachusetts, U.S.A.) Dec. 18, 1930, No. 38221. Convention date, Dec. 18, 1929. [Class 38 (i).] A high voltage fuse comprises a fuse wire 1 connected to a double wire 2 the whole being mounted on an asbestos cord 4 supported by a plate 6 by flattening a collar 7 on to the cord. The wire 1 is coiled and attached to the collar 7, the plate 6 being clamped against the end of a tubular contact 9 by a cap 13. At the other end the fuse is connected by a copper strip 3, that passes out of the open end of the tube 8, to a contact 18 by means of a roughened cone 15 and a clamping nut 16. When the fuse melts any parts released are blown out of the tube 8 which projects through the bottom of the fuse box. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of ejected parts hanging from the tube 8 as an indicator that the fuse has blown. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1477510-A (GB)
Title: Method of producing moulded cores employing microlaminations
IPC: H02K1/12
Filed: 1974-09-02
Abstract: 1477510 Making moulded stator cores WESTINGHOUSE ELECTRIC CORP 2 Sept 1974 [11 Sept 1973] 38224/74 Heading B3A A method of making a moulded core having a conductor embedded in it comprises forming the conductor 10, assembling the formed conductor in a flexible container 20 adding insulated ferro-magnetic micro-laminations 35 which have been annealed, into the container, sealing the container, compressing the microlaminations about the conductor to attain a packing factor in excess of 80% and removing the core from the container. The microlaminations comprise parallelepipeds of low carbon steel and they are formed by cutting unplated tin can stock with a high speed rotary cutter unsupported or by slitting the stock and then cutting it with a rotary cutter against a stationary knife edge. Alternatively the microlaminations can be formed from steel wool, shavings or scrap cobalt iron. The microlaminations are annealed at 700‹-800‹C for stress relief, deoxidation, decarburization and improvement of magnetic characteristics. The container 20 is formed of flexible polyurethane resin and the conductor 10 is coated with a rigid insulating coating (16), Fig. 1 (not shown), which maintains its shape after removal from the winding mandrel. The coil is placed in the container along with a core bar 30 and the container is vibrated while the microlaminations 35 are placed around the coil and in a space 34 between the core bar and the coil. A seal 36 is applied to the container when the required amount of microlaminations has been supplied and the sealed container is placed in an isostatic pressurization chamber, where a pressure of about 50 000 psi is applied. Binders for the microlaminations are not normally required, but they may be used if the core is to be subjected to high rotational stresses or if a low isostatic pressure is employed. If necessary a tape of magnetic material may be wound round the core to serve as a yoke.
Patent GB-955605-A (GB)
Title: Improvements in or relating to dust conveying trucks
Inventor: PROLE JOHN HAROLD ARNOLD
IPC: B61D5/00
Filed: 1960-11-08
Abstract: 955,605. Mixing in conduits. BABCOCK & WILCOX Ltd. Nov. 8, 1961 [Nov. 8, 1960], No. 38341/60. Heading B1C. [Also in Divisions B7 and B8] Relates to a mixing device facilitating the discharge of dust from a hoppered wagon (see Divisions B7 and B8). Referring to Fig. 3, dust is discharged by gravity via a conduit 6 into a cylindrical mixing chamber 9 where it is entrained with water from a jet 20 supplied from a pipe 23 controlled by a valve 24, the dust and water then passing through a Venturi 14 into a curved mixing pipe 18 the outlet of which is divided perpendicularly to the direction of flow before entering the pipe 18. Water is also supplied to the chamber 9 from jets 28 fed from an auxiliary annular distributer 25 connected to a branch water pipe 26 controlled by a valve 27. The jets 28 converge upon the jet 20. Aerating means, e.g. as described in Specification 885,510 may be provided to fluidize the dust emerging from the wagon before it enters the chamber 9.